background: injury is a leading cause of morbidity and mortality in children. there is insufficient data on the epidemiology or incidence of injuries in the first two years of life, especially in iran. the main objective of this study was to describe the incidence and causes of injuries in a sample group of infants and toddlers in mashhad, iran. methods: this prospective, observational study, w...

This paper discusses the role of the researcher as a participant observer and reflective practitioner. The paper aims to assess the benefits and limitations of participant observation, and offer guidance as to how to manage the challenges inherent in this technique. The paper draws on the lead author’s experience as a participant observer when working on her doctoral thesis: ‘Factors Affecting ...

ju xtacorticul sarcomas arc rare tumors. thev arc remarkable for their slow evolution . a short review of the literatu re and a brief description of this enti ty is presented together with our observation concerning one case seen at the tadj pahlavi institute tehran university. an interesting observation was the pa rticularly slow evo lu tion o r is yea rs duration in our .casc .

runoff estimation resulted from precipitation is the basis of more study in various develop and exploit design from water resource, then its measure and calculation due to environmental bottlenecks, always have a plenty problem. as a result of the importance of output runoff estimation and flood volume in watershed for the sake of country integrated watershed management in this study tried to 9...

Citation: Hirata-Okamoto R, Rangel-Gomez MG, Guerrero R, Zapata-Garibay R and Rosales CB (2017) The Leaders across Borders Certification Program—A Systemic Multiple Level Observation of Groups Analysis Approach to Measure Effective Leadership: A Case Study. Front. Educ. 2:52. doi: 10.3389/feduc.2017.00052 the Leaders across Borders Certification Program—A systemic Multiple Level observation of ...

The self-controlled case series method may be used to study the association between a time-varying exposure and a health event. It is based only on cases, and it controls for fixed confounders. Exposure and event histories are collected for each case over a pre-defined observation period. The method requires that observation periods should be independent of event times. This requirement is viol...